aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/python/pytest/py3/_pytest/logging.py
blob: 9f2f1c793593ec45a2aa2638ac343da369383f02 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
"""Access and control log capturing."""
import io
import logging
import os
import re
from contextlib import contextmanager
from contextlib import nullcontext
from datetime import datetime
from datetime import timedelta
from datetime import timezone
from io import StringIO
from logging import LogRecord
from pathlib import Path
from typing import AbstractSet
from typing import Dict
from typing import Generator
from typing import List
from typing import Mapping
from typing import Optional
from typing import Tuple
from typing import TYPE_CHECKING
from typing import TypeVar
from typing import Union

from _pytest import nodes
from _pytest._io import TerminalWriter
from _pytest.capture import CaptureManager
from _pytest.compat import final
from _pytest.config import _strtobool
from _pytest.config import Config
from _pytest.config import create_terminal_writer
from _pytest.config import hookimpl
from _pytest.config import UsageError
from _pytest.config.argparsing import Parser
from _pytest.deprecated import check_ispytest
from _pytest.fixtures import fixture
from _pytest.fixtures import FixtureRequest
from _pytest.main import Session
from _pytest.stash import StashKey
from _pytest.terminal import TerminalReporter

if TYPE_CHECKING:
    logging_StreamHandler = logging.StreamHandler[StringIO]

    from typing_extensions import Literal
else:
    logging_StreamHandler = logging.StreamHandler

DEFAULT_LOG_FORMAT = "%(levelname)-8s %(name)s:%(filename)s:%(lineno)d %(message)s"
DEFAULT_LOG_DATE_FORMAT = "%H:%M:%S"
_ANSI_ESCAPE_SEQ = re.compile(r"\x1b\[[\d;]+m")
caplog_handler_key = StashKey["LogCaptureHandler"]()
caplog_records_key = StashKey[Dict[str, List[logging.LogRecord]]]()


def _remove_ansi_escape_sequences(text: str) -> str:
    return _ANSI_ESCAPE_SEQ.sub("", text)


class DatetimeFormatter(logging.Formatter):
    """A logging formatter which formats record with
    :func:`datetime.datetime.strftime` formatter instead of
    :func:`time.strftime` in case of microseconds in format string.
    """

    def formatTime(self, record: LogRecord, datefmt=None) -> str:
        if datefmt and "%f" in datefmt:
            ct = self.converter(record.created)
            tz = timezone(timedelta(seconds=ct.tm_gmtoff), ct.tm_zone)
            # Construct `datetime.datetime` object from `struct_time`
            # and msecs information from `record`
            dt = datetime(*ct[0:6], microsecond=round(record.msecs * 1000), tzinfo=tz)
            return dt.strftime(datefmt)
        # Use `logging.Formatter` for non-microsecond formats
        return super().formatTime(record, datefmt)


class ColoredLevelFormatter(DatetimeFormatter):
    """A logging formatter which colorizes the %(levelname)..s part of the
    log format passed to __init__."""

    LOGLEVEL_COLOROPTS: Mapping[int, AbstractSet[str]] = {
        logging.CRITICAL: {"red"},
        logging.ERROR: {"red", "bold"},
        logging.WARNING: {"yellow"},
        logging.WARN: {"yellow"},
        logging.INFO: {"green"},
        logging.DEBUG: {"purple"},
        logging.NOTSET: set(),
    }
    LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-.]?\d*(?:\.\d+)?s)")

    def __init__(self, terminalwriter: TerminalWriter, *args, **kwargs) -> None:
        super().__init__(*args, **kwargs)
        self._terminalwriter = terminalwriter
        self._original_fmt = self._style._fmt
        self._level_to_fmt_mapping: Dict[int, str] = {}

        for level, color_opts in self.LOGLEVEL_COLOROPTS.items():
            self.add_color_level(level, *color_opts)

    def add_color_level(self, level: int, *color_opts: str) -> None:
        """Add or update color opts for a log level.

        :param level:
            Log level to apply a style to, e.g. ``logging.INFO``.
        :param color_opts:
            ANSI escape sequence color options. Capitalized colors indicates
            background color, i.e. ``'green', 'Yellow', 'bold'`` will give bold
            green text on yellow background.

        .. warning::
            This is an experimental API.
        """

        assert self._fmt is not None
        levelname_fmt_match = self.LEVELNAME_FMT_REGEX.search(self._fmt)
        if not levelname_fmt_match:
            return
        levelname_fmt = levelname_fmt_match.group()

        formatted_levelname = levelname_fmt % {"levelname": logging.getLevelName(level)}

        # add ANSI escape sequences around the formatted levelname
        color_kwargs = {name: True for name in color_opts}
        colorized_formatted_levelname = self._terminalwriter.markup(
            formatted_levelname, **color_kwargs
        )
        self._level_to_fmt_mapping[level] = self.LEVELNAME_FMT_REGEX.sub(
            colorized_formatted_levelname, self._fmt
        )

    def format(self, record: logging.LogRecord) -> str:
        fmt = self._level_to_fmt_mapping.get(record.levelno, self._original_fmt)
        self._style._fmt = fmt
        return super().format(record)


class PercentStyleMultiline(logging.PercentStyle):
    """A logging style with special support for multiline messages.

    If the message of a record consists of multiple lines, this style
    formats the message as if each line were logged separately.
    """

    def __init__(self, fmt: str, auto_indent: Union[int, str, bool, None]) -> None:
        super().__init__(fmt)
        self._auto_indent = self._get_auto_indent(auto_indent)

    @staticmethod
    def _get_auto_indent(auto_indent_option: Union[int, str, bool, None]) -> int:
        """Determine the current auto indentation setting.

        Specify auto indent behavior (on/off/fixed) by passing in
        extra={"auto_indent": [value]} to the call to logging.log() or
        using a --log-auto-indent [value] command line or the
        log_auto_indent [value] config option.

        Default behavior is auto-indent off.

        Using the string "True" or "on" or the boolean True as the value
        turns auto indent on, using the string "False" or "off" or the
        boolean False or the int 0 turns it off, and specifying a
        positive integer fixes the indentation position to the value
        specified.

        Any other values for the option are invalid, and will silently be
        converted to the default.

        :param None|bool|int|str auto_indent_option:
            User specified option for indentation from command line, config
            or extra kwarg. Accepts int, bool or str. str option accepts the
            same range of values as boolean config options, as well as
            positive integers represented in str form.

        :returns:
            Indentation value, which can be
            -1 (automatically determine indentation) or
            0 (auto-indent turned off) or
            >0 (explicitly set indentation position).
        """

        if auto_indent_option is None:
            return 0
        elif isinstance(auto_indent_option, bool):
            if auto_indent_option:
                return -1
            else:
                return 0
        elif isinstance(auto_indent_option, int):
            return int(auto_indent_option)
        elif isinstance(auto_indent_option, str):
            try:
                return int(auto_indent_option)
            except ValueError:
                pass
            try:
                if _strtobool(auto_indent_option):
                    return -1
            except ValueError:
                return 0

        return 0

    def format(self, record: logging.LogRecord) -> str:
        if "\n" in record.message:
            if hasattr(record, "auto_indent"):
                # Passed in from the "extra={}" kwarg on the call to logging.log().
                auto_indent = self._get_auto_indent(record.auto_indent)  # type: ignore[attr-defined]
            else:
                auto_indent = self._auto_indent

            if auto_indent:
                lines = record.message.splitlines()
                formatted = self._fmt % {**record.__dict__, "message": lines[0]}

                if auto_indent < 0:
                    indentation = _remove_ansi_escape_sequences(formatted).find(
                        lines[0]
                    )
                else:
                    # Optimizes logging by allowing a fixed indentation.
                    indentation = auto_indent
                lines[0] = formatted
                return ("\n" + " " * indentation).join(lines)
        return self._fmt % record.__dict__


def get_option_ini(config: Config, *names: str):
    for name in names:
        ret = config.getoption(name)  # 'default' arg won't work as expected
        if ret is None:
            ret = config.getini(name)
        if ret:
            return ret


def pytest_addoption(parser: Parser) -> None:
    """Add options to control log capturing."""
    group = parser.getgroup("logging")

    def add_option_ini(option, dest, default=None, type=None, **kwargs):
        parser.addini(
            dest, default=default, type=type, help="Default value for " + option
        )
        group.addoption(option, dest=dest, **kwargs)

    add_option_ini(
        "--log-level",
        dest="log_level",
        default=None,
        metavar="LEVEL",
        help=(
            "Level of messages to catch/display."
            " Not set by default, so it depends on the root/parent log handler's"
            ' effective level, where it is "WARNING" by default.'
        ),
    )
    add_option_ini(
        "--log-format",
        dest="log_format",
        default=DEFAULT_LOG_FORMAT,
        help="Log format used by the logging module",
    )
    add_option_ini(
        "--log-date-format",
        dest="log_date_format",
        default=DEFAULT_LOG_DATE_FORMAT,
        help="Log date format used by the logging module",
    )
    parser.addini(
        "log_cli",
        default=False,
        type="bool",
        help='Enable log display during test run (also known as "live logging")',
    )
    add_option_ini(
        "--log-cli-level", dest="log_cli_level", default=None, help="CLI logging level"
    )
    add_option_ini(
        "--log-cli-format",
        dest="log_cli_format",
        default=None,
        help="Log format used by the logging module",
    )
    add_option_ini(
        "--log-cli-date-format",
        dest="log_cli_date_format",
        default=None,
        help="Log date format used by the logging module",
    )
    add_option_ini(
        "--log-file",
        dest="log_file",
        default=None,
        help="Path to a file when logging will be written to",
    )
    add_option_ini(
        "--log-file-level",
        dest="log_file_level",
        default=None,
        help="Log file logging level",
    )
    add_option_ini(
        "--log-file-format",
        dest="log_file_format",
        default=DEFAULT_LOG_FORMAT,
        help="Log format used by the logging module",
    )
    add_option_ini(
        "--log-file-date-format",
        dest="log_file_date_format",
        default=DEFAULT_LOG_DATE_FORMAT,
        help="Log date format used by the logging module",
    )
    add_option_ini(
        "--log-auto-indent",
        dest="log_auto_indent",
        default=None,
        help="Auto-indent multiline messages passed to the logging module. Accepts true|on, false|off or an integer.",
    )
    group.addoption(
        "--log-disable",
        action="append",
        default=[],
        dest="logger_disable",
        help="Disable a logger by name. Can be passed multiple times.",
    )


_HandlerType = TypeVar("_HandlerType", bound=logging.Handler)


# Not using @contextmanager for performance reasons.
class catching_logs:
    """Context manager that prepares the whole logging machinery properly."""

    __slots__ = ("handler", "level", "orig_level")

    def __init__(self, handler: _HandlerType, level: Optional[int] = None) -> None:
        self.handler = handler
        self.level = level

    def __enter__(self):
        root_logger = logging.getLogger()
        if self.level is not None:
            self.handler.setLevel(self.level)
        root_logger.addHandler(self.handler)
        if self.level is not None:
            self.orig_level = root_logger.level
            root_logger.setLevel(min(self.orig_level, self.level))
        return self.handler

    def __exit__(self, type, value, traceback):
        root_logger = logging.getLogger()
        if self.level is not None:
            root_logger.setLevel(self.orig_level)
        root_logger.removeHandler(self.handler)


class LogCaptureHandler(logging_StreamHandler):
    """A logging handler that stores log records and the log text."""

    def __init__(self) -> None:
        """Create a new log handler."""
        super().__init__(StringIO())
        self.records: List[logging.LogRecord] = []

    def emit(self, record: logging.LogRecord) -> None:
        """Keep the log records in a list in addition to the log text."""
        self.records.append(record)
        super().emit(record)

    def reset(self) -> None:
        self.records = []
        self.stream = StringIO()

    def clear(self) -> None:
        self.records.clear()
        self.stream = StringIO()

    def handleError(self, record: logging.LogRecord) -> None:
        if logging.raiseExceptions:
            # Fail the test if the log message is bad (emit failed).
            # The default behavior of logging is to print "Logging error"
            # to stderr with the call stack and some extra details.
            # pytest wants to make such mistakes visible during testing.
            raise


@final
class LogCaptureFixture:
    """Provides access and control of log capturing."""

    def __init__(self, item: nodes.Node, *, _ispytest: bool = False) -> None:
        check_ispytest(_ispytest)
        self._item = item
        self._initial_handler_level: Optional[int] = None
        # Dict of log name -> log level.
        self._initial_logger_levels: Dict[Optional[str], int] = {}
        self._initial_disabled_logging_level: Optional[int] = None

    def _finalize(self) -> None:
        """Finalize the fixture.

        This restores the log levels and the disabled logging levels changed by :meth:`set_level`.
        """
        # Restore log levels.
        if self._initial_handler_level is not None:
            self.handler.setLevel(self._initial_handler_level)
        for logger_name, level in self._initial_logger_levels.items():
            logger = logging.getLogger(logger_name)
            logger.setLevel(level)
        # Disable logging at the original disabled logging level.
        if self._initial_disabled_logging_level is not None:
            logging.disable(self._initial_disabled_logging_level)
            self._initial_disabled_logging_level = None

    @property
    def handler(self) -> LogCaptureHandler:
        """Get the logging handler used by the fixture."""
        return self._item.stash[caplog_handler_key]

    def get_records(
        self, when: "Literal['setup', 'call', 'teardown']"
    ) -> List[logging.LogRecord]:
        """Get the logging records for one of the possible test phases.

        :param when:
            Which test phase to obtain the records from.
            Valid values are: "setup", "call" and "teardown".

        :returns: The list of captured records at the given stage.

        .. versionadded:: 3.4
        """
        return self._item.stash[caplog_records_key].get(when, [])

    @property
    def text(self) -> str:
        """The formatted log text."""
        return _remove_ansi_escape_sequences(self.handler.stream.getvalue())

    @property
    def records(self) -> List[logging.LogRecord]:
        """The list of log records."""
        return self.handler.records

    @property
    def record_tuples(self) -> List[Tuple[str, int, str]]:
        """A list of a stripped down version of log records intended
        for use in assertion comparison.

        The format of the tuple is:

            (logger_name, log_level, message)
        """
        return [(r.name, r.levelno, r.getMessage()) for r in self.records]

    @property
    def messages(self) -> List[str]:
        """A list of format-interpolated log messages.

        Unlike 'records', which contains the format string and parameters for
        interpolation, log messages in this list are all interpolated.

        Unlike 'text', which contains the output from the handler, log
        messages in this list are unadorned with levels, timestamps, etc,
        making exact comparisons more reliable.

        Note that traceback or stack info (from :func:`logging.exception` or
        the `exc_info` or `stack_info` arguments to the logging functions) is
        not included, as this is added by the formatter in the handler.

        .. versionadded:: 3.7
        """
        return [r.getMessage() for r in self.records]

    def clear(self) -> None:
        """Reset the list of log records and the captured log text."""
        self.handler.clear()

    def _force_enable_logging(
        self, level: Union[int, str], logger_obj: logging.Logger
    ) -> int:
        """Enable the desired logging level if the global level was disabled via ``logging.disabled``.

        Only enables logging levels greater than or equal to the requested ``level``.

        Does nothing if the desired ``level`` wasn't disabled.

        :param level:
            The logger level caplog should capture.
            All logging is enabled if a non-standard logging level string is supplied.
            Valid level strings are in :data:`logging._nameToLevel`.
        :param logger_obj: The logger object to check.

        :return: The original disabled logging level.
        """
        original_disable_level: int = logger_obj.manager.disable  # type: ignore[attr-defined]

        if isinstance(level, str):
            # Try to translate the level string to an int for `logging.disable()`
            level = logging.getLevelName(level)

        if not isinstance(level, int):
            # The level provided was not valid, so just un-disable all logging.
            logging.disable(logging.NOTSET)
        elif not logger_obj.isEnabledFor(level):
            # Each level is `10` away from other levels.
            # https://docs.python.org/3/library/logging.html#logging-levels
            disable_level = max(level - 10, logging.NOTSET)
            logging.disable(disable_level)

        return original_disable_level

    def set_level(self, level: Union[int, str], logger: Optional[str] = None) -> None:
        """Set the threshold level of a logger for the duration of a test.

        Logging messages which are less severe than this level will not be captured.

        .. versionchanged:: 3.4
            The levels of the loggers changed by this function will be
            restored to their initial values at the end of the test.

        Will enable the requested logging level if it was disabled via :meth:`logging.disable`.

        :param level: The level.
        :param logger: The logger to update. If not given, the root logger.
        """
        logger_obj = logging.getLogger(logger)
        # Save the original log-level to restore it during teardown.
        self._initial_logger_levels.setdefault(logger, logger_obj.level)
        logger_obj.setLevel(level)
        if self._initial_handler_level is None:
            self._initial_handler_level = self.handler.level
        self.handler.setLevel(level)
        initial_disabled_logging_level = self._force_enable_logging(level, logger_obj)
        if self._initial_disabled_logging_level is None:
            self._initial_disabled_logging_level = initial_disabled_logging_level

    @contextmanager
    def at_level(
        self, level: Union[int, str], logger: Optional[str] = None
    ) -> Generator[None, None, None]:
        """Context manager that sets the level for capturing of logs. After
        the end of the 'with' statement the level is restored to its original
        value.

        Will enable the requested logging level if it was disabled via :meth:`logging.disable`.

        :param level: The level.
        :param logger: The logger to update. If not given, the root logger.
        """
        logger_obj = logging.getLogger(logger)
        orig_level = logger_obj.level
        logger_obj.setLevel(level)
        handler_orig_level = self.handler.level
        self.handler.setLevel(level)
        original_disable_level = self._force_enable_logging(level, logger_obj)
        try:
            yield
        finally:
            logger_obj.setLevel(orig_level)
            self.handler.setLevel(handler_orig_level)
            logging.disable(original_disable_level)


@fixture
def caplog(request: FixtureRequest) -> Generator[LogCaptureFixture, None, None]:
    """Access and control log capturing.

    Captured logs are available through the following properties/methods::

    * caplog.messages        -> list of format-interpolated log messages
    * caplog.text            -> string containing formatted log output
    * caplog.records         -> list of logging.LogRecord instances
    * caplog.record_tuples   -> list of (logger_name, level, message) tuples
    * caplog.clear()         -> clear captured records and formatted log output string
    """
    result = LogCaptureFixture(request.node, _ispytest=True)
    yield result
    result._finalize()


def get_log_level_for_setting(config: Config, *setting_names: str) -> Optional[int]:
    for setting_name in setting_names:
        log_level = config.getoption(setting_name)
        if log_level is None:
            log_level = config.getini(setting_name)
        if log_level:
            break
    else:
        return None

    if isinstance(log_level, str):
        log_level = log_level.upper()
    try:
        return int(getattr(logging, log_level, log_level))
    except ValueError as e:
        # Python logging does not recognise this as a logging level
        raise UsageError(
            "'{}' is not recognized as a logging level name for "
            "'{}'. Please consider passing the "
            "logging level num instead.".format(log_level, setting_name)
        ) from e


# run after terminalreporter/capturemanager are configured
@hookimpl(trylast=True)
def pytest_configure(config: Config) -> None:
    config.pluginmanager.register(LoggingPlugin(config), "logging-plugin")


class LoggingPlugin:
    """Attaches to the logging module and captures log messages for each test."""

    def __init__(self, config: Config) -> None:
        """Create a new plugin to capture log messages.

        The formatter can be safely shared across all handlers so
        create a single one for the entire test session here.
        """
        self._config = config

        # Report logging.
        self.formatter = self._create_formatter(
            get_option_ini(config, "log_format"),
            get_option_ini(config, "log_date_format"),
            get_option_ini(config, "log_auto_indent"),
        )
        self.log_level = get_log_level_for_setting(config, "log_level")
        self.caplog_handler = LogCaptureHandler()
        self.caplog_handler.setFormatter(self.formatter)
        self.report_handler = LogCaptureHandler()
        self.report_handler.setFormatter(self.formatter)

        # File logging.
        self.log_file_level = get_log_level_for_setting(config, "log_file_level")
        log_file = get_option_ini(config, "log_file") or os.devnull
        if log_file != os.devnull:
            directory = os.path.dirname(os.path.abspath(log_file))
            if not os.path.isdir(directory):
                os.makedirs(directory)

        self.log_file_handler = _FileHandler(log_file, mode="w", encoding="UTF-8")
        log_file_format = get_option_ini(config, "log_file_format", "log_format")
        log_file_date_format = get_option_ini(
            config, "log_file_date_format", "log_date_format"
        )

        log_file_formatter = DatetimeFormatter(
            log_file_format, datefmt=log_file_date_format
        )
        self.log_file_handler.setFormatter(log_file_formatter)

        # CLI/live logging.
        self.log_cli_level = get_log_level_for_setting(
            config, "log_cli_level", "log_level"
        )
        if self._log_cli_enabled():
            terminal_reporter = config.pluginmanager.get_plugin("terminalreporter")
            # Guaranteed by `_log_cli_enabled()`.
            assert terminal_reporter is not None
            capture_manager = config.pluginmanager.get_plugin("capturemanager")
            # if capturemanager plugin is disabled, live logging still works.
            self.log_cli_handler: Union[
                _LiveLoggingStreamHandler, _LiveLoggingNullHandler
            ] = _LiveLoggingStreamHandler(terminal_reporter, capture_manager)
        else:
            self.log_cli_handler = _LiveLoggingNullHandler()
        log_cli_formatter = self._create_formatter(
            get_option_ini(config, "log_cli_format", "log_format"),
            get_option_ini(config, "log_cli_date_format", "log_date_format"),
            get_option_ini(config, "log_auto_indent"),
        )
        self.log_cli_handler.setFormatter(log_cli_formatter)
        self._disable_loggers(loggers_to_disable=config.option.logger_disable)

    def _disable_loggers(self, loggers_to_disable: List[str]) -> None:
        if not loggers_to_disable:
            return

        for name in loggers_to_disable:
            logger = logging.getLogger(name)
            logger.disabled = True

    def _create_formatter(self, log_format, log_date_format, auto_indent):
        # Color option doesn't exist if terminal plugin is disabled.
        color = getattr(self._config.option, "color", "no")
        if color != "no" and ColoredLevelFormatter.LEVELNAME_FMT_REGEX.search(
            log_format
        ):
            formatter: logging.Formatter = ColoredLevelFormatter(
                create_terminal_writer(self._config), log_format, log_date_format
            )
        else:
            formatter = DatetimeFormatter(log_format, log_date_format)

        formatter._style = PercentStyleMultiline(
            formatter._style._fmt, auto_indent=auto_indent
        )

        return formatter

    def set_log_path(self, fname: str) -> None:
        """Set the filename parameter for Logging.FileHandler().

        Creates parent directory if it does not exist.

        .. warning::
            This is an experimental API.
        """
        fpath = Path(fname)

        if not fpath.is_absolute():
            fpath = self._config.rootpath / fpath

        if not fpath.parent.exists():
            fpath.parent.mkdir(exist_ok=True, parents=True)

        # https://github.com/python/mypy/issues/11193
        stream: io.TextIOWrapper = fpath.open(mode="w", encoding="UTF-8")  # type: ignore[assignment]
        old_stream = self.log_file_handler.setStream(stream)
        if old_stream:
            old_stream.close()

    def _log_cli_enabled(self):
        """Return whether live logging is enabled."""
        enabled = self._config.getoption(
            "--log-cli-level"
        ) is not None or self._config.getini("log_cli")
        if not enabled:
            return False

        terminal_reporter = self._config.pluginmanager.get_plugin("terminalreporter")
        if terminal_reporter is None:
            # terminal reporter is disabled e.g. by pytest-xdist.
            return False

        return True

    @hookimpl(hookwrapper=True, tryfirst=True)
    def pytest_sessionstart(self) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("sessionstart")

        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
            with catching_logs(self.log_file_handler, level=self.log_file_level):
                yield

    @hookimpl(hookwrapper=True, tryfirst=True)
    def pytest_collection(self) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("collection")

        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
            with catching_logs(self.log_file_handler, level=self.log_file_level):
                yield

    @hookimpl(hookwrapper=True)
    def pytest_runtestloop(self, session: Session) -> Generator[None, None, None]:
        if session.config.option.collectonly:
            yield
            return

        if self._log_cli_enabled() and self._config.getoption("verbose") < 1:
            # The verbose flag is needed to avoid messy test progress output.
            self._config.option.verbose = 1

        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
            with catching_logs(self.log_file_handler, level=self.log_file_level):
                yield  # Run all the tests.

    @hookimpl
    def pytest_runtest_logstart(self) -> None:
        self.log_cli_handler.reset()
        self.log_cli_handler.set_when("start")

    @hookimpl
    def pytest_runtest_logreport(self) -> None:
        self.log_cli_handler.set_when("logreport")

    def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, None]:
        """Implement the internals of the pytest_runtest_xxx() hooks."""
        with catching_logs(
            self.caplog_handler,
            level=self.log_level,
        ) as caplog_handler, catching_logs(
            self.report_handler,
            level=self.log_level,
        ) as report_handler:
            caplog_handler.reset()
            report_handler.reset()
            item.stash[caplog_records_key][when] = caplog_handler.records
            item.stash[caplog_handler_key] = caplog_handler

            yield

            log = report_handler.stream.getvalue().strip()
            item.add_report_section(when, "log", log)

    @hookimpl(hookwrapper=True)
    def pytest_runtest_setup(self, item: nodes.Item) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("setup")

        empty: Dict[str, List[logging.LogRecord]] = {}
        item.stash[caplog_records_key] = empty
        yield from self._runtest_for(item, "setup")

    @hookimpl(hookwrapper=True)
    def pytest_runtest_call(self, item: nodes.Item) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("call")

        yield from self._runtest_for(item, "call")

    @hookimpl(hookwrapper=True)
    def pytest_runtest_teardown(self, item: nodes.Item) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("teardown")

        yield from self._runtest_for(item, "teardown")
        del item.stash[caplog_records_key]
        del item.stash[caplog_handler_key]

    @hookimpl
    def pytest_runtest_logfinish(self) -> None:
        self.log_cli_handler.set_when("finish")

    @hookimpl(hookwrapper=True, tryfirst=True)
    def pytest_sessionfinish(self) -> Generator[None, None, None]:
        self.log_cli_handler.set_when("sessionfinish")

        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
            with catching_logs(self.log_file_handler, level=self.log_file_level):
                yield

    @hookimpl
    def pytest_unconfigure(self) -> None:
        # Close the FileHandler explicitly.
        # (logging.shutdown might have lost the weakref?!)
        self.log_file_handler.close()


class _FileHandler(logging.FileHandler):
    """A logging FileHandler with pytest tweaks."""

    def handleError(self, record: logging.LogRecord) -> None:
        # Handled by LogCaptureHandler.
        pass


class _LiveLoggingStreamHandler(logging_StreamHandler):
    """A logging StreamHandler used by the live logging feature: it will
    write a newline before the first log message in each test.

    During live logging we must also explicitly disable stdout/stderr
    capturing otherwise it will get captured and won't appear in the
    terminal.
    """

    # Officially stream needs to be a IO[str], but TerminalReporter
    # isn't. So force it.
    stream: TerminalReporter = None  # type: ignore

    def __init__(
        self,
        terminal_reporter: TerminalReporter,
        capture_manager: Optional[CaptureManager],
    ) -> None:
        super().__init__(stream=terminal_reporter)  # type: ignore[arg-type]
        self.capture_manager = capture_manager
        self.reset()
        self.set_when(None)
        self._test_outcome_written = False

    def reset(self) -> None:
        """Reset the handler; should be called before the start of each test."""
        self._first_record_emitted = False

    def set_when(self, when: Optional[str]) -> None:
        """Prepare for the given test phase (setup/call/teardown)."""
        self._when = when
        self._section_name_shown = False
        if when == "start":
            self._test_outcome_written = False

    def emit(self, record: logging.LogRecord) -> None:
        ctx_manager = (
            self.capture_manager.global_and_fixture_disabled()
            if self.capture_manager
            else nullcontext()
        )
        with ctx_manager:
            if not self._first_record_emitted:
                self.stream.write("\n")
                self._first_record_emitted = True
            elif self._when in ("teardown", "finish"):
                if not self._test_outcome_written:
                    self._test_outcome_written = True
                    self.stream.write("\n")
            if not self._section_name_shown and self._when:
                self.stream.section("live log " + self._when, sep="-", bold=True)
                self._section_name_shown = True
            super().emit(record)

    def handleError(self, record: logging.LogRecord) -> None:
        # Handled by LogCaptureHandler.
        pass


class _LiveLoggingNullHandler(logging.NullHandler):
    """A logging handler used when live logging is disabled."""

    def reset(self) -> None:
        pass

    def set_when(self, when: str) -> None:
        pass

    def handleError(self, record: logging.LogRecord) -> None:
        # Handled by LogCaptureHandler.
        pass